4.3 Relieving Fluid and Pressure from the System for Plumbing
Repairs
In all procedures where you need to replace a plumbing component, you must
relieve pressure in the system before removal as described below.
To relieve pressure in the Therma-Flow
®
Plus:
1. Close the water supply valve.
2. Open the eyewash or shower to remove all fluid and pressure from the system.
For more information, see “3.2 Actuating and Stopping the Eyewash, Drench
Hose and Shower” on page 3-1.
4.4 Dismantling and Reassembling the Eyewash and Drench Hose
A. Complete the following procedure to access the heat trace cable (if applicable)
and ball valves.
To dismantle the eyewash and drench hose:
1. Switch off the electrical power supply.
2. Relieve fluid and pressure from the system as described in “4.3 Relieving
Fluid and Pressure from the System for Plumbing Repairs” on page 4-3
3. Eyewash: Remove the eyewash yoke by holding it at the wye and turning it
counter clockwise (see Figure 4-2).
4. Drench Hose: With a suitable wrench, remove the gray ½” PVC elbow
ensuring that the horizontal PVC nipple entering the cover through the
rubber grommet remains in place. The PVC nipple will act as a locator for
the covers during reinstallation (see Figure 4-2).
Figure 4-2. Eyewash and Drench Hose Fountain Sections
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